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| CAS号 : | 784-50-9 |
精确质量 : | 224.04700 |
| 分子式 : | C14H8O3 |
logP : | 2.59620 |
| 分子量 : | 224.21200 |
PSA : | 54.37000 |
9-芴酮-2-羧酸 | |
9-Fluorenone-2-carboxylic acid | |
784-50-9 | |
C14H8O3 | |
224.21200 | |
54.37000 | |
2.59620 | |
224.04700 |
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黄色粉末
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256.1ºC
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476.5ºC at 760 mmHg
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>300 °C(lit.)
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1.424 g/cm3
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Stable under normal temperatures and pressures.
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Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
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3
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S24/25
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2918300090
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品名, 成分含量, 用途 |
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2918300090 其他含醛基或酮基不含其他含氧基羧酸（包括酸酐、酰卤化物、过氧化物和过氧酸及该税号的衍生物）. 增值税率:17.0% 退税率:9.0% 监管条件:无 最惠国关税:6.5% 普通关税:30.0% |
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2918300090 other carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
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2918300090. Other carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives. General tariff: |
将2-乙酰芴和冰醋酸一起搅拌,加热,使之溶解。分次加入粉状二水合重铬酸钠,加热回流,于1.5h内滴加乙酐。然后将热的混合物倾入热水中,搅拌悬浮液,过滤,滤饼用2%硫酸洗涤,将滤饼加入5%氢氧化钾溶液中,搅拌,加热至80℃左右,过滤,再用氢氧化钾溶液洗涤。将钾盐溶液加热到70℃,搅拌,滴加18%盐酸,加热升温至85℃,析出芴酮-2-羧酸。再经煮沸,过滤,用热水洗去酸中游离的氯化钾,干燥而得成品。 | |
用于有机合成 |
